package cn.loveq.android.util;

import java.io.InputStream;
import java.util.Random;

import android.graphics.PorterDuff;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.Log;

/**
 * 
 *    
 * ��Ŀ��ƣ�BPILauncher   
 * ����ƣ�ImageUtil   
 * ��������   ͼ����
 * �����ˣ���ΰ��   
 * ����ʱ�䣺2012-1-13 ����06:04:52     
 * @version    
 *
 */
public class ImageUtil {
	
	//�Ŵ���СDrawable
	@SuppressWarnings("unused")
	public static Drawable zoomDrawable(Drawable drawable, int w, int h) {  
	    int width = drawable.getIntrinsicWidth();  
	    int height = drawable.getIntrinsicHeight();  
	    Bitmap oldbmp = drawableToBitmap(drawable);  
	    Matrix matrix = new Matrix();  
	    float scaleWidth = ((float) w / width);  
	    float scaleHeight = ((float) h / height);  
	    matrix.postScale(scaleWidth, scaleHeight);  
	    Bitmap newbmp = Bitmap.createBitmap(oldbmp, 0, 0, width, height,  
	            matrix, true);  
	    return new BitmapDrawable(null, newbmp);  
	}  
	
	
	
	// �Ŵ���СͼƬ
	public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
		int width = bitmap.getWidth();
		int height = bitmap.getHeight();
		Matrix matrix = new Matrix();
		float scaleWidht = ((float) w / width);
		float scaleHeight = ((float) h / height);
		matrix.postScale(scaleWidht, scaleHeight);
		Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
		return newbmp;
	}

	// ��Drawableת��ΪBitmap
	public static Bitmap drawableToBitmap(Drawable drawable) {
		int width = drawable.getIntrinsicWidth();
		int height = drawable.getIntrinsicHeight();
		Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);

		Canvas canvas = new Canvas(bitmap);
		drawable.setBounds(0, 0, width, height);
		drawable.draw(canvas);
		return bitmap;

	}
	
	
	// ��Drawableת��ΪBitmap
	public static Bitmap drawableToBitmap(Drawable drawable,Config config) {
		int width = drawable.getIntrinsicWidth();
		int height = drawable.getIntrinsicHeight();
		Bitmap bitmap = Bitmap.createBitmap(width, height,config);
		
		Canvas canvas = new Canvas(bitmap);
		drawable.setBounds(0, 0, width, height);
		drawable.draw(canvas);
		return bitmap;
		
	}

	// ���Բ��ͼƬ�ķ���
	public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {

		Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
		Canvas canvas = new Canvas(output);

		final int color = 0xff424242;
		final Paint paint = new Paint();
		final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
		final RectF rectF = new RectF(rect);

		paint.setAntiAlias(true);
		canvas.drawARGB(0, 0, 0, 0);
		paint.setColor(color);
		canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

		paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
		canvas.drawBitmap(bitmap, rect, rect, paint);

		return output;
	}

	/**
	 * ��ȡԲ��ͼ��
	 */
	public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
		if (bitmap == null)
			return null;
		Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.RGB_565);
		Canvas canvas = new Canvas(output);

		final int color = 0xff424242;
		final Paint paint = new Paint();
		final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
		final RectF rectF = new RectF(rect);
		final float roundPx = 5;

		paint.setAntiAlias(true);
		canvas.drawARGB(0, 0, 0, 0);
		paint.setColor(color);
		canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
		paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
		canvas.drawBitmap(bitmap, rect, rect, paint);
		return output;
	}
	


}
